AME5142

REL-1229 -B
Reliability Report
for
AME5142 Series Product
Approved by
Prepared by
Amy Shen
Quality & Reliability Dept.
Manager
Eric Chen
Quality & Reliability Dept.
Engineer
Conclusion:
The AME5142 series product has successfully met AME’s reliability standard that is required on all
AME, Inc products.
Furthermore, QRA Dept. of AME, Inc monitors the reliability continuously to make sure that all
AME8500 series product will still meet AME’s reliability standard in the future.
Table of Contents:
Ⅰ、General Description
Ⅱ、Product Information
Ⅲ、Failures In Time Calculation
Ⅳ、Product Reliability Test Result
Ⅴ、Package Reliability Test Result
Ⅵ、IR-reflow Test Result
Ⅰ、General Description:
The AME5142 is a Boost DC/DC converter specifically designed to drive white LEDs with a constant
current. The device can drive one to six LEDs in series from a Lilon cell. Series connection of the LEDs
provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors.
The AME5142 switches at 1.2MHz, allowing the use of tiny external components. The input and output
capacitor can be as small as 1µF(or 4.7µF), saving space and cost versus alternative solutions. A low
0.15V feedback voltage minimizes power loss in the current setting resistor for better efficiency. The
AME5142 is available in SOT-26/TSOT-26 & SOT-25/TSOT-25 packages.
Ⅱ、Product Information:
Pin
Operating Ambient
Package
Number of
Configuration
Temperature Range
Type
Pins
E:-40℃ to 85℃
E:SOT-2X
V: 5
ADJ: Adjustable Y: Lead free &
Y: 6
Low profile
A
(SOT-25)
(TSOT-25)
A
(SOT-26)
(TSOT-26)
1. SW
2. GND
3. FB
4. EN
5. IN
1. SW
2. GND
3. FB
4. EN
5. OVP
6. IN
Output Voltage Special Feature
Z: Lead Free
Ⅲ、Failures In Time Calculation:
Use HTOL test information mentioned in sectionⅣ, FIT (Failures In Time) can be calculated as below:
FIT = ( x 2 (ν ,
CL )
× 10 9 ) /( 2 × S × H × AF ) = ( 4 .61 × 10 9 ) /( 2 × 77 × 1000 × 280 .59 )
=106.69 (pieces per 109 hours) @ 40℃ with 90% Confidence Level.
Where AF is acceleration factor setting activation energy to 1.0eV as zero failure.
Ⅳ、Product Reliability Test Result:
Test Item
HTOL
Test Condition
Precondition
NOTE 1
Sample Size / Failures
Result
77 pcs / 0 pcs
Pass
3 pcs per pin pair / 0 pcs
Pass
3 pcs per pin pair / 0 pcs
Pass
3 pcs per pin pair / 0 pcs
Pass
TSTRESS=125℃
Duration=1000hrs
Biased, Read at
168/504/1000 hours
ESD
Human Body Model
Pin-to-Pin test
Level 2, 2kV minimum
Charged Device Model
Level 2, 200V minimum
Latch-up
Level 3, 100mA minimum
NOTE 1: 85/85 168 hours + IR-reflow 3 cycles with Peak Temp.= 245℃ (leaded) or 260℃ (lead-free).
Ⅴ、Package Reliability Test Result:
Test Item
MSL
HTS
THT
PCT
TCT
TST
Solderability
Test Condition
85/85 168 hours
IR-reflow 3 cycles
Peak Temp.= 260℃ (lead-free)
IPC/JEDEC J-STD-020C
Precondition NOTE 2
Temp.=150℃
Duration=1000 hours
Unbiased, Read at
1000 hours
Precondition NOTE 2
Temp.=85℃, R.H.=85%
Duration=1000 hours
Unbiased,
Read at 1000 hours
Precondition NOTE 2
Temp.=121℃, R.H.=100%
15PSIG, Unbiased
Duration=168 hours
Read at 168 hours
Precondition NOTE 2
-65℃ ~ 150℃
500 cycles Unbiased,
Read at 500 cycles
Precondition NOTE 2
-55℃ ~ 125℃
200 cycles Unbiased,
Dwell time:5min
Read at 200 cycles
Temp.=245℃ (leaded)
Temp.=260℃ (lead-free)
Duration=5sec
Sample Size / Failures
Result
22 pcs / 0 pcs
Level 1
45 pcs / 0 pcs
Pass
45 pcs / 0 pcs
Pass
45 pcs / 0 pcs
Pass
45 pcs / 0 pcs
Pass
45 pcs / 0 pcs
Pass
5 pcs / 0 pcs
Pass
NOTE 2: 85/85 168 hours + IR-reflow 3 cycles with Peak Temp.= 245℃ (leaded) or 260℃ (lead-free).
Ⅵ、IR-reflow Test Result:
Test Item
Test Condition
Sample Size / Failures
Result
IR-reflow
See IR reflow Profile
22 pcs / 0 pcs
Pass
Perform 3 cycles test
IR reflow Profile:
Profile Feature
Average Ramp-Up Rate
(Tsmax to Tp)
Preheat
- Temperature Min (Tsmin)
- Temperature Max (Tsmax)
- Time (tsmin to tsmax)
Time maintained above
- Temperature (TL)
- Time (tL)
Peak/Classification Temperature (Tp)
Time within 5℃ of actual Peak
Temperature (tp)
Ramp-Down Rate
Time 25℃ to Peak Temperature
Sn-Pb Eutectic Assembly
Pb-Free Assembly
3℃/second max.
3℃/second max.
100℃
150℃
60~120 seconds
150℃
200℃
60~180 seconds
183℃
60~150 seconds
245℃
217℃
60~150 seconds
260℃
10~30 seconds
20~40 seconds
6℃/second max.
6 minutes max.
6℃/second max.
8 minutes max.